What might be the reasons for NOT indicting them?
Just from more of a layperson, court of public opinion POV, indicting a sitting senator along with 2 former senators kind of adds fuel to the politically motivated charges fire (not saying that's my personal opinion just a thought) I can easily imagine most congressional republicans rallying hard around the flag if Perdue and Graham are indicted; if Fani's goal is to get Trump, keeping him more isolated from the party adds to that vs taking on all of the GOP in the court of public opinion.